Miniature Volcanoes.
In a rather large porcelain or glazed earthenware basin place a small quantity of nitrate of lead. This may be obtained for a few cents from any painters’ supplies store. Then upon it throw some flakes of sal ammoniac. Immediately a number of conical elevations will be formed, which give off vapors and burst with a popping noise.
Altogether the experiment represents very exactly, volcanoes in a state of eruption. When the eruption ceases, the rough, broken state of the remaining mats, represents as nearly as a thing on this earth of ours can, the appearance of the moon through a powerful telescope.
Indeed the moon at one time of its history was undoubtedly in the soft lava-like state that you will observe in the basin, during the first stage of this elegant and instructive experiment.
USEFUL AND INSTRUCTIVE BOOKS.
HOW TO DO THE BLACK ART—Containing a complete description of the mysteries of Magic and Sleight-of-Hand, together with many wonderful experiments. By A. Anderson. Illustrated. Price 10 cents. Address Frank Tousey, publisher, N. Y.